Except for panleukopenia which has an extremely high
mortality rate, survives in the environment for 13
months, and can be brought in to the house on an
owner's clothing or shoes and can only be destroyed
with bleach disinfection on nonporous surfaces for
15-30 minutes. Panleukopenia has decimated entire
shelters. Indoor only cats can be infected by the most
scrupulous owner, even if they change clothes before
entering their home, after visiting or volunteering at
a shelter or maintaining a feral cat colony.